Safety mechanism for embroidering-machines.



J. A. GSROBBLI.

SAFETY MBGHANISM POR BMBROIDBRING MACHINES.

APPLICATION FILED AFB.. l1, 1911.

Patented Sept. 3, 1912.

4 SHEETS-SHEET 2. ,we f

@Hom/ lug i J. A. GROBBLI. SAFETY BHIGEABHSINI FOR BMBROIDERING MACHINES.

APPLICATION FILED APILll, 1911. 1.037,471 Patented. sept, 3,1912. L 4 SHEETS-SHEET 3.

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'Hou/10.13

J. A. GROEBLI.

SAFETY MECHANISM POR EMBROIDBRING MACHINES.

APPLIGATION FILED APE. 11, 1911.

1,037,471. A Patented sept.3,1912.

4 SHEETS-SHEET LNrTED sTA'rnsiTENr onirica JOSEPH A. GBOEBLI, OF NEW YORK; N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO

ALPHONSE H. KURSHEEDT, OF NEW YORK, .N. Y.

SAFETY MECHANISM non EMBROIDERINe-iviA'oHiNns.` i i Specification of Letters Patent. Application led April 11, 1911. Serial No. 620,381." zy

Patented Sept. I3, 1912.

To all 'whom t mayconcem Pfc. it known that I, JOSEPH A. GROEBLI, a citizen of the United States, and a resi- .dentl oft-he city, county, vand State of New York, have invented a certain new and useful t v Safety Mechanism for Embroidering, Machines, of which the following "is a speci-,2.

My present Ainvention relates to a stop mechanism for embroidering machines and thesame is particularly advantageous in machines of the large type wherein several hundred needles simultaneously operate to produce an embroidered design, in multiple, on a fabric. In such machines much diiiiculty has been experienced in attending to the .many threads which become broken or unduly slack and unless the broken or slack threads are detected and remedied the needle having the broken thread fails to performv its embroidering function properly, andthe part of the embroidery being worked by such needle falls behind the other needles, andthe defect in the design has to.v

be remedied by hand work after'the fabric has been removed from the machine, which entails considerable labor which cannotbe previously estimated. Thiscontinual breaking of the threads is one of the' greatest annoyancesin the operation of the embroidering machine and aside from t-he fact ,that

defects resulting therefroml increase theg cost Y is the defects' `thus produced that my invention overcomes-- It often happens that a defect in the thread will occur and but a few stitches will occur before the attendant' observes the defect, and when she is apprised of it the defect may be often remedied while'the machine is in pperat-ion and in such cases it may be advantageousnot to stop the machine for obviating the defect lWhere it can be done quickly and whilethe machine is in operation. lnlother` cases however, the `machine should be stopped. This isyso, when na defect has existedA 1n a eliminate one of the 2;. thread or lthreadsI` which' escapes the at'- tention of the attendant for a number of previously discovered defect inanother. In

any .case 1t" is desirable toso control' the machinethat no matter what "mayca'use 'the delay -in attending to a defective thread, 'the machine will be automatically stoppedvvhen f, I

a defecteXists during a given number of stitches.` v sarily required for all the threads jon the machine is to reduce the cost'offvmanufacture lof the. embroidery, vand toreduce vthe defects in the same is to not only reduce, the cost of the finished product,- but also lto items-in the cost. Y, A- r.

My present 1nvent1on= is'fdevised tov overcomet-the previous obstacles, and to cont-rol the machine, in itsl 'operation more or less automatically, so-"that-` the lneglect or in- 'ability'` 0f the attendant to'keep the threads im proper condition will not result in pro- S ducing embroidery having more ,than trivial rdefects. y 1 `g My invention in its fullest embodiment includes means for giving Qbothf'visibleand audible signals to Warn the attendant that a defect exists, and also, mechanisml which will stop the machine ifthe attendant fails to obviate the defect during afreasonablc time ori if she faiils to nliviategalf'lathe defects.

` This mechanism for 'stopping-the machine is so constructed that'if adefect existsv for a certainfiumber of stitches the machine will be automatically stopped. I prefer tov con` struct the same sothat the machine will beV 'stopped only' when a predetermined number of yconsecutiveV stitches have been taken by the machine v after the defectoccurs, and which will berestored to starting or normal condition if after several stitches have been taken the defect disappears. vThe ,purpose of this restoring operation is to avoid useless most objectionable y To reducel vthe attention neces stopping of the machine., for if the machine I 'is stopped' when not. altogether necessary, 4

the stop mechanism'will be as objectionable as the .diificulties;.,which vit is intended to overcome. Veryofteii the defective thread willv be corrected'afterfthesignal has been given, and before the machine is automat-i.- callyv stopped, -in which event,` my impro-ved mechanism will bc automatically restored so that the machine will not be stopped when taken after a defect arlses, and a defect then defect, but only after the fifteenth, owing the defect has been obviated. This restoraticn isaautomatic and therefore is not de` pendent upon any attention-by the operator. By this means it is possible to predetermine the number of stitches which the machine will be permitted to take after a defect arlses, before .the same will be automatically stopped. and the action will not be cumulative. That is, if the machine is set to .be stoppedl when fifteen 'stitches have been arises and it is remedied after five stitches have been-completed', and afterward another defect arises the mechanism will not operate after the tenth stitch following .this second to the restoration of the mechanism when the first defect was remedied. It may happen often that a defect, such as an undue slack in a thread, will show during one or several operations of the machine, and afterward disappear, without materially affecting the work and I desire to avoid stopping thel. machinefor. such unobjectionable detai s.

My present invention in no way interferes with the usual hand operated stopping device which is usually employed on the machine, though I prefer; to combine pants of the latter with my improved device to save duplication of parts.

Reference will be made to an issued U. S. patent and also to a pending application as by such cross references the present case can be simplified. r

In the drawings forming a part ot' this application, Figure 1, is an elevation of my invention, showing the elect-ric circuits diagrammatically. Fig. 2, is an elevation, enlarged, of parts of the stop mechanism.

Fig. 3, is a cross section taken on the linev 3-3 of Fig. 2. Fig. 4, is a sectional view taken -on the line 4--4 of Fig. 3. Fig. 5, is a sectional'view taken onrthe line 5-5 of Fig. '3. Fig. 6, is a sectional view taken on the line 6--6 of Fig. 237 Fig. 7, is a plan view. Fig. 8, is a sectional view taken :on the line 8-8 of Fig 3. Fig. 9, is an elevation of certain cam movements. Fig. 10, is a section thereof, taken on the line 10-10, of Fig. 9. Fig. 11, is a similar view, taken on the line 11-11, of Fig..9. Fig. 12, is a sectional View, taken on the line 12-12, of Fig. 1. Fig. 13, is a cross sect-ion,

showing parts of the stitching mechanism of an embroidering machine and that part of my present invention whereby" the thread defects are detected and the circuits oper'- sewjnggthreadsof the embroidering maplate 122.

chine I preferably employ a part of the mechanism shown and described 1n my pending application, Serial No. 513,246, and. filed August 17th, 1909. Cross reference is made to that application to simplify the present case, since parts of that device are introduced into-the present mechanism, wit-hout change.

In Figs. 13 to detecting device similar to that shown in my copending On the frame work 104, of the embroidering machine are shown the usual thread take up bars 105, 106 which are carried upon their respective supporting bars 107,- 108, which swing with their shafts 109, 110, and any ordinary mechanism may be employed to rock these shafts. The shaft 111', supported yon the frame work supports the usual tension roller or let olf 112; and beyond this the thread spools 113 are mounted. To the left is yshown the needle bar 114,`whichcar -ries the sewing needles 115, in the usua manner. These elements are all commonly known in this art. Between the thread rspool and the needle, vand preferably between the thread take up and sewing needle I provide the device for testing the sewing thread to detect a defective condition therein. 'Plates 116, and 118, are arranged a short distance above one another and between the upright supports 117. 'Ihevplate 116 has an aperture 119, for each detecting needle 120, while the plate 118, forms a support fori the lower ends thereof under cer- 'tain conditions. The detecting needle 120 is 16, I have shown a threadl application above referred to.

arranged in the line of lthe thread 115 and The plate 122 is thus arranged to swing apart from the plate 121. Preferably on a wooden bar 130secured against the member 118, I hinge-a contact arm 124, which has a weight 126, on one end which tends to keep its upper end against the swinging An insulating block 125 keeps the arm 124, electrically separated from the plate 122, to prevent short circuiting.v The circuit wire 3', is connected wit-hthe contact arm 124, while a circuit wire 9, is arranged along the bar- 130, in position where contact can be made by the point 128, of the contact arm. It is here where'theqcircuits are closed when a defect/exists f @sewing thread, for the purpSeQo-f ope' A A 'g' the signals and stop -me'chanisml 'There are' as many detecting needles.120, as there are sewing threads, dependently. l

each' of which may operate in-' i? the sewing'th-reads they are supported above .t '140. The-angle lever 136, 139 -is rocked by the l1;"eciproc'ations .of a rod 141, and the 'lf -a'ctionof-a returniilg spr1ng"142, connected tothefangle lever. The devicefor operatling the rod 141 isful-ly shown in my copending application'v herein recited. An arm 137 on the plate 131 extends below ythe fulcrum .120 of the lat-ter, and a spring v138, acting thereon -ke'eps the forward edge ofthe plate in f /contact with the' bar 118. `The plate 131 'supports the detecting needles at their lower ends during lpart of the stitching operation of the machine, is thenmoved from under the needles to theleft, and is next moved across the path -of the detecting needles. The plate 131 is moved from under the detect-ing needlesjust pre-.ions `tothe `take up .l action on the sewing threads ;Y and while the take up is drawing'the thread taut the plate is moved over the bar 118, across the path of the detecting need-les'. All` threads which are then'in lproper condition 'will be drawn "55' taut, andwill support their detecting needles above .the edge of the .plate 131. But` 'a thread-eis unduly slacker broken, its 1detecting needle will not/*bel supported at I p' "this time, and as aresult I'i'tslower end will 740 beengaged by Vthe plate 131':y f Such needle will be moved laterally by the plate 131, as `shown in Fig. 13, and taking its fulcrum from the plate 116, it will rock the plate 122 outwardly upon its supporting-hooks 123. The contact arm 24, will be-swung by this action until contact element 128, makes c'ontact with wire 9.wh`en the circuit is closed between wires 3 and 9. Thisconstitutes the detectingunechanism and for further details regarding the same reference may be had to myy copending application Serial Number 513246, wherein thel samer-is described in de-y tail. The shaft 133, has anti-arm 12, connected at its lower end with wire9. This A ,55 arms swings periodically with the shaft 133,.

" and periodically breaks the circuit movlf' ing away from wire 3, the'purpo'se'ofwhich will appear hereinafter. i

In Fig. -l Iy have shown diagrammat1cally,

l the velectrical circuits and'a reference will l alle v,here made to the same and the councs aid application, and they pass through the lights 2, by which visible signals are given at various locations throughout the length ofthe machine, and join a common connecting wlre 3, of a circuit.v The wire 3,

4 and 5 and from the other' end of the passes the'circuit to one -of the brushes of a generator 7, or other source of electrical supply.'` AF rom the other brush ofthe generator .7, a wire 8, carries the circuitto the wire 9. and the operation of the detecting mechanism causes., one or the other legs 1,

to be closed with'this last wire, thereby closing the circuit which gives the visible signal through -the lights. This action is for the same purpose as the lights in my said pending application, with the exception' of the function performed by the electromagnets 4 and 5, as will appear hereinafter. branch 10, which passes the circuit through a bell 11, in series in this circuit, through the intermittent circuit breaker 12, which is the passes to and connects lwit-h, one 'of the. wlndings of a pairV of electromagnets/ winding of the electromagnets a wire 6v From the wire 8, I have taken a same as, and operates for the same purpose as the intermittent circuit breaker 32, in said application, thence through the wire 13, to a binding post/14. At this point the circuit is adapted to be opened or closed by means which will be described; andthe cirp cuit leaves the binding post 15, through the .wire 16, from which it is, .taken back .to one of the brushes of the generator 7, the wires andv 6, preferably uniting to eliminate Nas much wiring as practical.

thus traced correspond with the `cicuits of the said application, the means for operating them is pre preferably the same as in the said application and to a certain eX- tent they perform the same functions. That is,'the lights A2, give a visible signal when a defect arises in any of thesewing threads, which not only warns the operator of the ico The circuits 4'existence of a defect,but also the approxi- 11, gives ana audible signal, when the defect continues for a given period of time. `But in the present case the device for closing the circuit through the audible signaling device is different from that of my said application, as will be apparent.b In the mechanism for operatingv the stop mechanism of the embroidering machine I have embodied the means for operating to close one of the signals, the one which gives the second or delayed. signal, in t-he present showing this being the bell or audible signal. The mechanism for operating to automatically stop the embroidering machine is preferablyconstructed and operated as folnismup withsome part of the machine fpresent electrical. circuit correspond with, .65 and are similarly operated to t-he legs of the which operates continuously, or which-.at

least operates during the stitching operations ofthe machine, and thoughthis connection may be made with various parts of the embroidering machine mechanism I pre- 5 fer, for the sake of avoiding complications in the embroidering machine m'echanisnnto connect the same with the main-shaft 18, of the embroidering machine. On the main shaft 18, I have arranged a gear 19, which miters with a gear 20. The shaft 26 which carrles the operating force to the safety mechanism isjournaledin a journal 22, on a bracket 24, at one end, and in a journal 23,

at its upper end; and the gear is carried on the lower end o fthe shaft 26, where-A by the latter is revolved in unison with the operation of the embroidering machine.V The shaft 26, carries the operating force to the safety mechanism and for the' purpose of 20 distributing the operating force through different mechanism, I have arranged a gear 89, on the upper end of the shaft 26, which miters with the gear-90, mounted on a .short shaft 91, from which the operating force is distributed to certain mechanisms. The shaft 91, 'therefore revolves synchro# nously with shaft `26, and therefore with the operation of lthe embroidering machine. There is a cam 94, on the shaft 91, vwhich acts upon a roller 95, carried on a lever 93, which fulcrums from the point 96, whereby the lever is rocked at each revolution of the shaft. To this lever 93, at therpoint 3 0a I have fulcrumed .an upwardly extending rod 30, which rises and falls with the lever -93, and wliich operates one of the pawls of the safety mechanism. Thereis an eccentric 97, on the shaft 91, about which engages` a strap 98, and the latter is carried by another lever 99, which fulcrums from the point 96.v

At 31a of the lever 99, I have fulcrumed another upwardly extending rod 31, which carries a pawl 43 by which, and rod 30, the ratchet wheel of the mechanism is given .15 a step by step movement. Through the connection just described it will be apparent that both rods 30 and 31 will rise and fall periodically, their timel of movement being slightly different. j

.On the base plate 27 I have mounted an outwardly extending shaft, or rather studv 32, on which are provided certain revolving part-s ofv the mechanism. -On this stud I' have prio" 'ded a revoluble sleeve 33, which 55,/y is held thereon .by the 'pin.34. A main- /l/ spring 35, 4isf-,coiled about one portion of the' sleeve 33, having one end 36, connected fast to thesleev'fand the other end 37, connected r"to an arbor 38, whereby the stress of the spring will cause a strain uponthe'sleeve to resist the revolution of the sleeve and return it to a given position, whenever the device for revotving the sleeve is released; and it is through this spring action that I 55 restore the partsto a stated condition in the event that the detecting mechanism fails to show a defectivecondition in the threads for a predetermined number of consecutive operations of the embroidering machine; and also after! the stop mechanism has been initiated, to bring the parts back to a starting position4 ready forfvthe. nextv operation. I have provided on 4the sleeve 33, a collar 39, which is fastened thereto'uand this collar vcarries a projection 40, whichengagcs with a stop 38, and retains the sleeve-and its associated partsin aigiven position. On the sleeve there is wheel 42, by wlnch the sleeve may be given a step by steplmotion` and I prefer to connect the device for giving the stepby step motion, and the device ,for holding the sleeve against return, with this samev ratchet wheel, to make the number of parts as small as possible. The upwardly extending arm '31, which is periodicallyv rocked at each operation of the lever 99, andtherefore at each stitching operation of the .embroideringi machine, has a pawl 43, on its upper en which is arranged to4 engage' inthe ratchet wheel 42. y The arm 31, is provided with an armaturel 45, which comes inline with the cores 'of the electromagnets 4 and 5, and by the action of the electromagnets on l this armature, when the 'magnets are energized by theclosing of their circuit, the

arm 31, is drawntoward the magnets, and thus the arm 31, is drawn into such a position as will causeits awl 43, to engage the teeth 4of the ratchet w eel 42, topperate the latter. The arm 31, has a spring 55, colinected therewith and with a "stud 55* on the base which tends to draw the arm 31,-to the rovided a toothed ratchet' left to retain the-pawl 43, out-of engagement with the ratchet except when the arm is drawn over by the magnets andfthisspring'.

is vof such a strength as can be overcome by the action of the magnets on the armature 45.

The upwardly extending arm 30 has a slot 51, in which engagesa pin 100,v on the lever 52, the arrangement being such that the lever 52, will be Vrockedat each downward movement ofthe `arm 30 and will be returned by'its spring, 101," on the return lever 52 may be rocked by other means as will be appar ent in the subsequent description. It will be apparent that the action of the arm 30 is only to move th'e end ofthe lever 52 downwardly, leaving it to the :ic-'

' secured tothe lever 52 is a curved 'arm 59,

which is acted upon by a rod at the same` of the arm 30,- but 'the slot 51, is such that, if the arm 30 is in its upper position the cess 61.

time .that the stop motion is operated, to

cause t-he release of the pawl 57, as will api--r pear, p.

On the sleeve 33, I have secured a cam 60, which is showin at the side of the ratchet wheel and this cam has shown thereon a re- On a pin 62, is fulcrumed a make"l and break lever 63, which carries a laterally projecting pinl 64, the purpose oftwhich is to engage the cam 60, so that the lever 63, may be rocked. When the parts are in the position shown in lFig. 2, which Ais the starting or, normal position, thepin 64, lies in the recessf61 of this cam and the lever 63, is held l so by agspring 65, which surrounds the pin 62, and presses down on the end of lever 63.

It will' be apparent that when the sleeveA and the cam beginto revolveto the left, the cam 'will act ontheipin64, to raise the end of lever 63, until the contact plate` 66, ycarried thereby, which is connected with the bin ling post 15, by a wire 67, finally concircutis .closed the second signal. indicating that a detect has existed for a given number o-tstitches, will he given. A On Athe sleeve I have also provided a cam which is adapted:-

ljo initiate the operation of the stop mechanisml ,The cam 68, which isse'cured to the- .sleeve 'is adapted for this, purposeas .will

noiv be shown.

By cross reference Jtoll. S. Patents Nos. cotesttt July 12, 189s and 911234C of Feb.-

r, riliaijfy'2, 1909, itwill be observed that I have I. Y there shown a mechanism which is adapted c Vto bring" the embroidering machine to a stop and to'avoid showing a complete stop mechanism herein, 'I lprefer to make cross reference to said patents and to say that I prefer tti-employ that stop mechanism in conjunctioniviththe present mechanism for initiat- "ing its operatiilui. In these patents I have" infn" a'shait 17, and'by rocking that-shafty ...top .mechanism is operated to I,bring the n A n'iachine'to a stop. I'preterahlyconnect my l' lpresent mechanism tothe shaft Y17, of such structure, whereby the ladvantages of` such y. Y 'stop mechanism will utilized with my 'present'mechanism for operatingit. Inthe lower part ot l, -I have shown a` shaft 6i), and this is preferably theshatt 17, of my 1 said "patent'suand (by causing this shaft to "f r'qk 'the stopmechanjsm shown invsaid 4pat- .ents may beczuscctto operate. I have taets with the post `14, thereby closingthev j I circuit which includes' the bell. -When the and is the same as my said patents. .To the short shaft 72, is connected a straddlmg v piece 75, which rocks freely on shaft72.` To

this bracket I have connected an upwardly extending arm 7 6, which has an arm' 7 7, to engage the arm' '73, of the mechamsm. k A

spring v78, is connected to the arm 76to hold the parts inthe position shown in Fig. 1, and to ca'use thejrocking ot'arm 76 when the latter is released. The upper end ofthe arm 76, is engaged byl a trigger .79, which rocks on a shaft 80, and when thls trigger 1s' released the spring 78, rocks the arm 76, and

through the a1m77 operates the stop mechanism. To the trigger 7 9, I have connected a. link 81, which is also fulcrumed to an up-l wardly extending rod; 82, which passes upwardly to a point -where it will be operated on by the stop initiating mechanism.A The rod 82, is guided by 'a bracket 83, so that it reciprocates vertically and a spring 84, tends to raise the rodfor the purpose of releasing the trigger when the rod itself is released.

On the sleeve 33, I have provided avcam 68, which revolves therewith and the projection 85, of this cam is arranged toirip the lever consisting of the short arm V86` and a longer arm 87', which fulcrum/s/ atv88. 'The lower end of the arm 87,w gilthecam isvin the position shownin Fig lies in the path of theend of the rod 82, thereby retaining thelatte'r-in its lower position. It is to be the proj ecting plate-'59 of the ylever 52. y

, Upon a'pin 102, just below the lever 52, I have fulcrumed an arm 53, the purpose of. which is to engagel the arm 50, projecting from the arm 31. On the arm 53, is provided' a depending'end 46, whichl is located where it can engage `against the end of the arm 50', to hold the arm 31,l over when it has been drawn by the magnets, to carry out the desired operations. On the rod 30 is a pin 54,"which engages the arm 53, forv the purpose ofl raising its engaging end at each upward movement of the arm 30, to disengage :the projection 46', from the arm 50. The return movement of t-he arm 53, is caused by va l spring 103, pulling down,y thereon.

The operation of my inventionis as fol- `lowst---As the embroidering machine oper- :soV

-'not-ed that-v the rod, 82, lies directly-below arm 30 and therefore lever 52. Y At each downward movement of arm 30, .the lever 52, will be tripped to disengage its pawl 57 from the ratchet wheel 42, leaving the same. subject to the action of the pawl 43, or the main spring. It will be apparent that since the arm v30, moves up and down almost si multaneously 4with arm 31, the downwardmovement of the' arm 31, and its pawl 4:3,

' will take place just as the lever 52, is

tripped, and therefore when the pawl 57 is released fromthe ratchet. .So long as there is no action in the circuits, the arms 30 and l31 will simply rise and fall without effecting any change in the mechanism,'as the arm 31, is held away from the ratchet wheel by the spring 55. In tliis;condition the main spring 35, holds the sleeve in what.

may be called a normal or starting position, with thestop 40, in contact withthe arbor 38, andthe cams in the position :shown in Fig. 1. If now a defect occurs in a sewing thread of the embroidering machine, the detecting mechanism previously described will cause the circuit which includes the lights 2, to be closed by the contact arm 124, of said mechanism. Since the electromagnets 4 and 5, of my present structure are .included in the circuit with the lights not only will the visible signals be given, but the magnets will be energized. The intermittent circuit breaker 12, so operates that the bell will not sound continuously, but the circuit will be intermittently broken at the breaker. `Thusyby closing the light circuit, the first signal is given. When the light circuit is thus energized, the magnetic action .of the magnets acting on the armature 45,

of the arm 31, will draw the latter tothe right in Fig. 1, at a time when the arm is up. The arm 30, having been caused to rise by reason of its connection with the embroidering machine mechanism, and the armature 45, being-'on a line with the cores of the magnets, the magnets will draw the arm 31 toward them, suiiicient to bring the pawl 43, into engagement with the teeth of the ratchet. When the arm 31 rose upwardly, the arm 53, was held high enough to prevent its depending end 46, from engaging the Varm 50. The magnets'having caused the pawl 43, to engage the ratchet, if the magnets should become deenergized the pawl will be temporarily held in 'the ratchet, lby theV engagement of the end 46 of arm 53,

against the end ofthe arm 50 and for this reason the downward movement of the arm 30, slightly precedes the downward movement of the arm 31. The arms 30 and 31 are now ready vto descend and they will be causedto do so automatically. The action of the arm 30, on the lever 52, will cause the pawl 57, to disengage from the ratchet, leaving the latter subjectto the action of the pawl 43. Upon the descent of the pawl 43, theratchet wheel and likewise the sleeve with'the cams which it carries, .will be rotated, say one notch,.by the pawl '43. As the the lever 52, and cause the spawl 57, to reengage the ratchet. By the time the 'pawl 5 7 is caused to rengage theratchet, the arm stitchin 53 is rocked by the pin 54 to carry the projectionV 46, away from the end'of the arm 50 so that the arm 3 1, may be drawn by its spring 55, to disengage the pawl 43, from the its advanced position by the engagement of the pawl 57 with the ratchet. This completes one stitching operation of the embroidering machine. If the defect in the sewing thread still exists upon the next stitching operation of the embroidering machine, the o-peration just described will be repeated and as a result the ratchet wheel, sleeve and cams, will be rotated one more notch, and the pawl 57 will again hold the ratchet in its advanced position. I preferably arrange the cam 60, and the arm 63,A so that when the sleeve has been rotated three steps the arm 63 will rock-sufciently to cause its contact 66, to strike the post 14, when in 4consequence thereof, the bell'circuit will be closed and the second or audible signal will be given, indicating. to the atmechanismwill be operated preferably after several stitches have been taken, succeeding the last signaling. The step by step movement of the ratchet Wheel and sleeve con- -tinues at each operation of'the machine and if a defective condition of the threads continues`after a predetermined number" of operations, preferably about i12, the projection 85, of the cam 68, willstrike the lever arm 86, and as afresult" the lever 86, 87,.will be rocked on its fulcrum, when the arm 87, will be moved awayffrom the rod 82. The rod 82, being thus released vit is moved upwardly by its sprin 84, li ewise the link 81,4`and the trigger` 9, will be rocked, to release the :arm 76. Thislatter being released, will be drawn over by its spring 78, which will-cause the shaft 72, to rock and through the lever 70, the shaft 69, will :be rocked and thus the stop mechanism referred to in my said patents will be set into operation to stop the machine. When therod 82,` moved upwardly as just described, it struck the extended arm 59, of the lever 52 causing the latter to rock, the purpose of whichis to release the pawl 5 7, when thest'op mechanism has been initiated, so that the sleeve will. befi-ee to .behreturned by the main spring, s othat the mechanism will be again in its starting, osition: AllVnen the defect in the sewing t ead has been remedied the machine may be again started in the usual manner by pulling the hand rope. This will rock the arm 76, until it is l again engaged by the trigger 79, when the.

y tion for the next operation. p mechanism i's thus restored to an operative may be taken up after several stitches later4 stop initiatingmechanism will be in condi- The Whole condition.

The above operation is -What takes place Whena detect exists for a number of Aconsecutive stitches and is not properly attended to by the attendantyln some cases the by the regular operation of the machine, iii

which event it would serve no benelicial purposeto let the stopping mechanism Acontinue and stop the machine,l but would in fact be a disadvantage. Therefore I have constructed the present `mechanism so that it will be restored Wherethe defect does not exist for the predetermined number of stitchesin `consecutive order so that if the defect disappears, the stop mechanism Willv begin all over again from its starting position. In eitherV of the above events the action will bev as follows z-The defect being detected as before, the arm will be drayvn over by the magnets, and thepavvl 43, Will I engage and rotate the Iratchet, Wheel and there will bevno engagementof its-,payvl 43 with the ratchet Wheel. As the paWl-T, is

sleeve, and the pawl, 57, Will hold the ratchet in :its advancedposition. This 'Will be caused by the closing of the light circuit4 and the same operation may be repeated for several stitches, and it maycontlnue until the bell circuit is closed, provided the defect continues during consecutive stitches. yIf however, vthe detect disappears or is reme- ,i

died beforethe stop mechanism is operated a different action willl take place. The

'lever 52, itwill be remembered is trippedautomatically by reason ofjts operation ,by the arm,.30 with each operation of the embroidering machine. The ratchet is held from returning bythe pawl 57, until the .arm 31, moves to its elevated position. It,

when the arm 31, is raised andthe threads are being tested on` a succeeding stitching.

operation, the defect which previously registered, fails to reappear, 4or continue to appear-,the detectingrneedles 24, of my said pending application Will all be held upand.

as a result the plate 19, of said construction will not be swung and the light circuit will not be elo-sed as on theprevious operations. The electiomagnets therefore: will. .not be .energizedduringthe operation of the, arm 31, now under consideration, andthe latter Will not be drawn to the right against its,v

spring so that when the arm 31, movesdown automatically` released, preferably just about the time the pawl 43, goes down, and,

as thelatter is now not in engagement with the ratchet lWheel, there Will be nothing tof hold the ratchet Wheelat this'mom'ent as' a result the main spring Will revolve'thef"v "l sleeve, and its associatedparts, untilthe stop 40 contacts with the arbor 38",;vvhenth'i' sleeve and its parts will beresto-red 4to fthei first or starting positionni The ,mechanism a" will now begin anew, and-'it a defectISeSv j; L

in any thread it will have to exist 4forth predetermined number -"of stitches before' the stopniechanism will ,be operated. There Will be performed bythe cons'ecutive present )mechanism all the functions necessary 'to detect defects in themany` threads of the machine to. give proper signals Warningof the `existence of a defect, otits continuan-ce 'for'several stitches, and inally if the threads arenot attended to the machine will beautomatically stopped."v By defer-- l ring-the stopping ofthe machine a great-,i

deal of unnecessary stopping of the machinen is avoided and the attendant is` allowed proper time to remedy the defect to avoidf stopping.4 By making thev device y, self-restoring`l no attention need be given by the 'attendant to the stop mechanism to yrestore the same forvits renewed operation.l

It yWill fbe apparentthat vchanges maybe made in the structure` u :fithouty departing i fromthe spirit and scop'e ofvpmy, invention.

It will alsojbe apparent that vthe various' branches of my invention may befsegregated land used independently or separately to obv taint-he advantagesthereof. I l

Having A' described claim-is:. l, Y M y l. An embroidering machine ,embodying for .stoppingV the embroidermg machine vadapted to be operated by said testing mechanism only when the latter is made` operative by a detector defects existing-for` a plurality yof stitching operations of the emmyinvention;` Y f i means for stitching a fabridmeans for .f-f; testing the sewing thread, stop mechanism@ iio broidering machine. 2. An embroidering machine embodying Jg means for stitching a fabric, means for periodically testingi the4 sewing threads Vfor the purpose of detecting l the condition thereof, stop mechanism for stopping the embroidering machine, adapted to be. op-v-Q.

erated lby .said detecting -mechanismv only when the latter inade operative by a-de-i-g feet or defects, existing ,in the -s,ewing threads. for a plurality of= consecutive i stitching operations oit the embroidering( machine.l

lAn' embroidering machine embodying means forfistitching a lfabric, l: means fori'- ltest-img); the sewingrthreads to detect aide ,tective ,eonditioiiI ethereo," a signal ing *deL- f vice for indicatingtheexistence of. a'defect 1:130 i I v- :1, 7).'.- .y fi' i s mit in the sewing thread and adapted to be operated by the` said testing mechanism, a stop mechanism for the embroidering machine andmeans whereby saidl stop mechanism Will be operated only when the signaling device is made operative for a plural` ity of operations of the embroidering machine. l

4. An einbroidering machine embodying means for stitching a fabric, means for testing the sewing threads to det-ect a defective condition thereof, a primary signaling device adapted to be operated by said thread testing device, a seco-nd signaling device adapted to be operated after a plurality of operations of said first signaling device, stop mechanism for the em-broidering machine, and means whereby said stop mechanism will be made operative after -said second signaling det-'ice has been made operative for a plurality of" consecutive stitching operations of ,the embroidering machine.

5. An embroidering machine embodying means for stitching a fabric, means for testing the sewing threads to detect a defective condition thereof, a visible signaling device adapted to be operated by said thread testing device and adapted toindicate the approximate location of the defective thread, an audible signaling device adapt ed to be operated after; a plurality of operations of said visible signaling device,

-stop mechanism for the embroidering machine, andv means whereby said step mechanism will be made operatlve after said second signaling device has been made opera.

y t-ive for a plurality of stitching operations of the embroidering machine.

G. An embrcidering machine embodying means for lstitching affrfabric, a testing device for periodically testingthe sewing threads, stop mechanism for the embroidering machine, means whereby the stop mechanism Will be made operative after a predetermined number of consecutiveoperations of the said testing device and Vneans for restoring saidstop mechanism to its'initial position upon a discontinuance of the .operations of said testing mechanism.

7. An embroidering machine embodying means lfor stitchingia fabric, a 4testing device -for periodically testing the sewing threads, a stop mechanism for the embroidering machine and means operated synchronously with tlie operation of the embroidering machine for sett-ing the stop mechanism into'operation, and means operated by said thread testing device and adapted to initiatev theI operation of said stop mechanism by its said operating mechanism only after theoperation of said initiating device afor tions of theembridering machine.

tions of said ay plurality of opera-.-

nosagarfil 8.',An embroidering machine embodying means for stitching a fabric, a testing device for periodically testing the sewing threads, stop mechanism for the embroidering machine and means operated synchnonously with th opera-tion of the embroidering machine a apted to set said stop motion into operation only after a plurality of operations of* the .testing device, and means operated by said thread testing mechanism, for initiating t-he operation of the`r stop mechanism byits `operating mechanism.

9. An embroidering machine embodying means for stitching a fabric, a testing device for periodically testing the sewing.

' operating device, and means for restoring said latter device 1f the said meansf'or causing its operation fails to operate consecutively for a predetermined number of operations. Y

10. An'embroidering machine embodying means for stitchingfa fabric, a testing device for -periodically testing the sewing threads, a stop mechanism for the embroidering machine` means for operating the stop mechanism, and adapted to beoperated by a plurality of operations of said thread test-- ing device, means for restoring said operating means, and means for automatically releasing said operating meanswhen said stop mechanism has been operated whereby the operating mechanism will be restored by its restoring means.

11. An embroidering machine embodying means for f stitching a fabric, means for periodicallyvf'testing the sewing threads to detecta defect therein, stop mechanism for the embroidering machine, and means whereby said stop mechanism will be made operative only after a plurality of operathread testing mechanism.

12. An embroidering machine embodying means for stitching a fabric, means for testing the sewingthread to detect a defective condition thereof, stop mechanism for the embroidering machine, means operated by the embroidering machine, and requiring a plurality of operations to set the stop mechanlsm into operation, and an electromagnet adapted to control the operation of said stop mechanism by its controlling mechanism, said electromagnet being cont-rolled by said threadtesting mechanism.`

18. An embroidering machine embodying means forstitching a fabrie,.means for test,- ing the sewing thread to detect a defective condition thereof, stop mechanismfor the embroidering machine, means operated by the embroidering machine and adapted by cuit'of said magnet, said signaling device a plurality of operations to set the stop mechanism into operation, and an electromagnet adapted to control the operation of said Vstop mechanism, by its controlling mechanism, a signaling device .in vthe cirand electromagnet being controlled by said thread testing mechanism.

111. An embroidering machine embodying means for st-itching a fabric, means for testing the sewing thread to detect a defective condition thereof, stop mechanism for the embroidering machine and lmeans for causing the operation thereof,- comprising means adapted to be operated step by step, and arranged to cause the operation of the stop mechanism after a predetermined number of operations, means for operating saidl step by step means, and means operated by said thread testing device for effecting the operation of said step by step device.

15. An embroidering machine embodying meansv for stitching a fabric, means for testing the sewing thread to detect a defective condition thereof, stop mechanism for the A embroideringmachine, andmeans for causing the operation thereof, comprising means adapted to be operated step by step, and

arranged to cause theoperation of the stop mechanism after a predetermined number of operations, means for causing successive operations ofsaid step by step device, means for holding the step by step device, means v operatedl by said thread testing device for effecting the operation of said step byl step device, and means for restoring said step by step device.

1G. An embroidering machine embodying means for stitching a fabric, means for pe? i'iodically testing the sewing thread to ,detect4 a defective condition thereof, stop mechanism for the embroidering machine,

- and means for causing the operation thereof,

comprising means adapted to be' operated step by step, and arranged to cause the opmeans for causing the operation thereof,

comprising means adapted to be operated step by step, and arranged to cause the operation of the stop'mechanism after a predetermined n umberv of operations, means for restoring the step by step device, means for operating said step by step device, means forperiodically holding said'step by step device to prevent its restoration, and adapt- 1"ed to hold said step bystep device during device, and to be released when the thread testing device, is active, and means operated by said thread testing device for causing, the operation of said step by step device;

18. An embroidering machine embodying means for stitching a fabric, means for pea defective con itin thereof, stop mechanism for the embroidering machine and means for causing the operation thereof, comprising means adapted to be operated step by step, and arranged to cause the opdetermined number of operations, means for ing pawls, one of which is adapted to operate said step by step device, and the other to periodically hold the saine, means operated synchronously With the embroidering niachine for periodically operating said pawls, and means adapted to be operated by said thread testing devi'ce for causingsaid first pawl to become inoperative.

19. An embroidering machine 'embodying means for stitchiiiga fabric, means for testing the sewing thread to detect a defective condition thereof, an electric signaling deinechaiiism for the embroidering machine, and means whereby the circuitI of the signal device Will be opened upon the operation of the stop mechanism.

20. An embroidering machine embodying means for stitching a fabric, means for testcondition thereof, an electric circuit controlled by said detecting device, and an electromagnet in said circuit, a secondl electric chanical means for closing said second electric circuit, said mechanical closing means vbeing controlled by said electromagnet.

2l. A n embi'oiderin machine embodying means for stitching a abric, means 4for testing the sewing'thread tofdetect a defective condition thereof, stop mechanism for the embroidering machine, means operated by .the embroidering machine for operating said stop mechanism, an electric circuit including an electromagnet, and controlled by said detecting device, said electromagnet bestop mechanism by its operating mechanism, after a predetermined number of .operations of said detecting device.

22. An embroidering machine embodying means for stitchinga fabric, means for testriodically testinthe sewing thread to detect".l

vice operated by said testing device, stop ing the sewing thread to detect a defective circuit includin'or a si nalin device me-` ing adaptedy to cause the operation of said the inactive period of said thread testing eration of the stop mechanism aftei ay preoperatingthe step by step device compriscircuit, said mechanical closin ing the sewing thread, to detect a defective condition thereof, stop mechanism for the embroidering machine and means'foreffect-v ing the operation thereof, embodying a ratchet wheel, a feeding pawl for operating the same, means for operating the pawl, and means operated by said detecting device, adapted to cause the operative engagement of the feeding pawl with the ratchet wheel, whereby the latter will be operated step by step.

24. An embroidering machine embodying means for stitching a fabric, means for testingvthe sewing thread, to detect a defectivecondition thereof, stop mechanism for the embroidering machine and means for effecting the operation thereof, embodying a ratchet wheel, a feeding pawl for operating 'the same means for operating the pawl, and

means operated by said detecting device, adapted to cause the operative engagement of the feeding pawl with the ratchet wheel, whereby the latter will be operated step by step, means for'restoring the 'ratchet wheel, and a holding pawl engaging the ratchet wheel to hold the latter during the return movement of said first pawl,jand means for releasing said holding pawl when said first pawl makes its active movement.

25. An embroidering machine embodying means for stitching a fabric', means for periodically testing the sewing thread, an electric circuit including a visible signal adapted @to be closed by said testing device, an electromagnet in said'circuit, a second circuit including an audible signal, a stop mechanism for the embroidering machine and means for causing the operation thereof, and fthe closing of said second circuit, embodying a shaft having cams and a ratchet wheel, a feed pawl for causing a step by step movement of the ratchet wheel, whereby the second circuit will be closed and;the stop mechanism operated after predetermined numbers of operations of the ratchet wheel, means for periodically operating the feed pawl mechanically, said feed pawl being adapted to be moved into engagement with the ratchet wheel by said magnet, a spring for restoring the ratchet wheel when released, a holding pawl for the ratchet wheel, and means for operating the holding pawl whereby the same will be caused to hold the ratchet wheel during the inactive period of said thread testing device and released from the ratchet during the active period of the thread testing device, whereby upon the failure of the thread testing device to close first circuit consecutively, the ratchet wheel' will be free to be restored by its said spring.

26. An embroidering machine embodying means for stitching a fabric, means for periodically testing the sewing thread, an electric circuit adapted to be closed by said testing device, and an elect-romagnet in said circuit, astop mechanism forl the embroidering machine, and means forcausing the operation thereof, embodying a shaft having a cam and a ratchetwheel, a feed pawl for causing a stepnby step movement of the ratchet wheel, whereby the stop mechanism will be operated after a predetermined numebr of operations of the ratchet wheel, means for operating said -feed pawl mechanically, said feed pawl being adapted to be moved into engagement with the ratchet wheel by sai-d magnet, means for mechanically retaining said feed pawl in such engagement during the active movement of the pawl, a spring for-restoring saldratchet wheel when released, a holding pawl for .the ratchet wheel, said ratchet wheel being adapted to be restored by its spring upon the failure of the testing device to close said circuit for a predetermined number of consecutive operations of the machine.

Signed at the city, county and State of New York this 6th day of April 19ll.

. JOSEPH A. GROEBLI. Vitnesses:

EDWARD D. C. SPERRY, A. A. DE CAET.

Gopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, 1

Washngtom D. C. 

